Solar panels

[Trevor B.]

I am new to this forum, I searched for solar and found nothing. I live in North Texas.

So my questions are:

1. Is it cost effective to put a solar panels on the roof? 

2. If you do put solar panels on the roof would you include electric in the cost of rent or still have them pay the electric bill separately?

3. Would y'all do other energy efficient updates to the house like new windows, insulation, and doors, even if not needed?

4. Finally how much would y'all up-charge in rent for these additions?

Thank you.